Thermodynamics Analysis of Solar-Rice Husk Hybrid Power Plant

Abstract

The main objective of this study is to make thermodynamics analysis of different components of solar rice husk hybrid power plant with its modification of structure by implementing a Rice Husk Dryer between the Condensate Pre-heater and Air Pre Heater in order to feed dry rice husk to furnace and performance evaluation of power plant with respect to reduction of moisture content of rice husk using MATLAB, R2016a. The flue gas is passed to the Rice Husk Dryer, where the heat of flue gas is used to dry the rice husk before feeding to the furnace. Solar energy is limited to a 50% share in the daytime. In this research solar parabolic collector and Rice, husk feed is arranged in a parallel to produce steam. Feeding with dry rice husk in the furnace was found to reduce the heat loss due to heating moisture present in rice husk up to furnace temperature and also heat loss due to excess air supplied to the furnace for evaporating and superheating the moisture present in the rice husk. The increase in furnace efficiency, fuel efficiency, thermal efficiency and plant efficiency, reduction in specific rice husk consumption, reduction in excess air supply and decrease in rice husk consumption, etc. with respect to reduction in the moisture content of rice husk for the power plant are evaluated. The result showed that with the reduction of moisture from 10% to 90%, the power plant efficiency is to be increased by 6.97% to 64.86% for boiler pressure of 50 bar.